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103 Cards in this Set
- Front
- Back
On oxygen cylinder valve the pressure regulator connections the threads are |
*right-hand* |
|
On acetylene cylinder valves and pressure regulator connections the threads are |
*left-hand* |
|
Cracking the cylinder valve momentarily before connecting the pressure regulator helps to |
Blow Away foreign matter |
|
Before you attach the pressure regulator to the cylinders you must |
Crack the cylinder valves |
|
Valves on an oxygen cylinder should be opened |
All the way |
|
Before you open the cylinder valves the working pressure adjusting screw on the cylinder pressure regulator should be |
Screwed all the way out |
|
A flame that has too much acetylene is called an _____ flame |
carburizing |
|
When lighting an oxy fuel gas torch you should use a |
Flint lighter |
|
When cracking a cylinder valve you should |
Stand to the side of the valve Outlet |
|
Why should you open cylinder valve slowly |
To avoid damaging the cylinder pressure regulator |
|
You have pressurized an oxyfuel gas system and close the cylinder valves there is a leak in the system if the cylinder pressure regulator gauge |
Goes down |
|
Maximum safe working pressure for acetylene is |
15 psi |
|
To extinguish an oxy acetylene flame you should first |
Close the torch acetylene valve |
|
Why should you not fully open the acetylene cylinder valve |
So you can close the valve quickly in an emergency |
|
The gas hoses and pressure regulators are purged in order to |
Remove any foreign matter |
|
Which flame is the ideal one for oxyfuel gas cutting |
Neutral |
|
Empty oxygen cylinder should be stored |
Separately from Full cylinders |
|
Correct working pressure can be found |
On the equipment manufacturers cutting tip chart |
|
The colour of fuel gas acetylene hoses are |
*Red* |
|
The colour of oxygen gas hoses are |
*green* |
|
Which factor is important when determining the size of oxy fuel gas hose to be used |
Length of hose |
|
Oxygen fittings can be identified by |
*Right hand threads* |
|
What does a grooved nut on an oxy fuel gas fitting show |
Fuel gas use only |
|
Oxyfuel gas connectors are made of what material |
Brass alloy |
|
To repair severed oxyfuel gas hoses you should use |
a ferrule-crimping tool |
|
New oxyfuel gas hoses before being used should be |
Blown out with compressed air |
|
Cutting thick material with a large tip you might have to |
Use a large-diameter hose |
|
Oxygen and Fuel Gas hose connectors are identical |
False |
|
What is the main function of a cylinder pressure regulator |
Reduce cylinder pressure and maintain consistent flow |
|
The gauge with the higher calibrations on cylinder pressure regulator shows the |
Cylinder pressure |
|
To increase the working pressure on an acetylene pressure regulator you would |
Turn the working pressure adjusting screw clockwise |
|
The gauge with the lower calibrations on a cylinder pressure regulator shows |
Working pressure |
|
Before you open a cylinder valve the working pressure adjusting screw on the cylinder pressure regulator should be |
Back out until tension is relieved |
|
Oxygen and acetylene pressure regulators are interchangeable |
False |
|
It is advisable to use a two-stage cylinder pressure regulator when |
Precise gas regulation is needed |
|
what type of cylinder pressure regulator is most widely used |
single-stage |
|
Which combination of gases is most preferred for fuel cutting of low carbon steel |
Acetylene and oxygen |
|
The name of the liquid used to stabilize acetylene in an acetylene cylinder |
Acetone |
|
Gas that produces the highest flame temperature when mixed with oxygen |
Acetylene |
|
Name one desirable characteristic of propane |
Easy and safe to handle |
|
Which fuel gas needs the least amount of oxygen to produce a neutral Flame |
Acetylene |
|
What is one advantage of acetylene has over other fuel gases |
High flame temperature |
|
Acetylene can be identified by its |
Pungent odour |
|
Which field gas uses the most oxygen to produce a neutral Flame |
Propane |
|
What is the maximum working pressure for acetylene gas at or below 21°C |
15 psi |
|
What type of fittings must never be used on an acetylene system |
copper |
|
Which fuel gas is the most stable and the safest |
mapp gas |
|
Propane gas is supplied in what form |
Liquid form |
|
The major component of air is |
Nitrogen |
|
What is a safety device on acetylene cylinders |
Fusible plugs |
|
At what pressure is oxygen stored in T-Type cylinders @ 21°C |
18 MPa |
|
What happens to the pressure inside an oxy fuel gas cylinder as the temperature increases |
Pressure increases |
|
Safety device on an oxygen cylinder is located on the |
Cylinder valve assembly |
|
Cryogenic containers of liquid oxygen are preferred over high-pressure cylinders containing oxygen gas because |
They are more economical to use then high-pressure cylinders |
|
Safety devices on cryogenic containers are |
Pressure relief valves |
|
How many turns should you use to open an acetylene valve |
1 1/2 turns |
|
Why should acetylene cylinders never be completely emptied |
Acetone would be drawn into the pressure regulator |
|
Acetone cylinders are filled with |
Acetone and a porous material |
|
When you operate liquid fuel gas cylinders they should be |
In an upright position |
|
Manuel oxyfuel gas cutting guides are used to ensure |
Accurate cuts |
|
A circle cutting guide is usually attached to the |
Cutting torch tip |
|
What kind of shapes are temp plates generally used to cut |
Irregular shapes |
|
One advantage of oxyfuel gas cutting machines over manual cutting |
Speed of cut can be accurately controlled |
|
A straight line cutting machine can be used to cut a circle |
True |
|
How many torches do shape cutting machines usually have |
Could be any number |
|
On what type of oxyfuel gas cutting machine is a magnetic Tracer use |
Shape cutting |
|
Oxyfuel gas pipe beveling machines are used to bevel pipe and to |
Cut pipe to size |
|
What is the main purpose of an oxygen or fuel gas manifold system |
Deliver large volumes of gas |
|
Where is an oxygen manifold system usually located |
In a special room outside the welding shop |
|
Stationary manifold systems are commonly used |
in large welding shops and trade training institutions |
|
What does the term duplex mean when referring to a manifold system |
It has two banks that can operate independently |
|
Identify the safety device found on acetylene manifold systems |
Reverse flow check valves (RFCVs) |
|
A low-pressure station regulator is usually easily identifiable because it |
Only has a working pressure gauge |
|
What was traditionally used to connect oxygen cylinders to a manifold system |
Coiled copper alloy tubing |
|
Acetylene manifold systems must be equipped with |
A hydraulic flashback arrestor |
|
Non-ferrous Alloys are difficult to cut because they contain |
Little or no iron |
|
Oxyfuel gas easily cuts |
Low carbon steel |
|
The protective oxide Shield is formed when you cut cast iron or alloy steels because the |
Oxide has a higher melting temperature than the base metal |
|
Cast iron can be more easily cut with the oxyfuel gas process if it is |
Preheated |
|
To make cutting cast iron easier you can |
Use a waster plate |
|
A ferrous alloy is one that contains |
iron |
|
Certain ferrous alloys are hard to cut because they produce a _____ on the surface of the metal |
Protective oxide |
|
A waster plate helps when cutting certain ferrous alloys by |
Diluting the base metal slag with iron |
|
Chemical flux cutting is especially useful for cutting |
Stainless steel |
|
Metal powder cutting is a process where a powder containing _____ is injected into the cut area |
Iron |
|
Aluminum cannot be cut with oxyfuel gas because it |
It does not contain the iron necessary for oxidation |
|
The cutting tip size is determined by the |
Thickness of the metal it will cut |
|
What is the purpose of a reverse flow check valve |
Control the direction of gas flow |
|
What is the purpose of a flashback arrestor |
Stop the flame burning back in the hose and prevents reverse flow of gases |
|
The single large Center orifice of a fuel gas cutting tip is used for what gas |
Cutting oxygen |
|
The torch that is designed to be used for either cutting or welding by changing the tip attachments |
Two-piece torch |
|
The smaller holes in a cutting tip are called |
Preheat flame holes |
|
Propane gas requires what kind of cutting tip |
A specially designed tip |
|
A rosebud tip is used for |
Heating metals |
|
Injector type torches are designed for use with |
Fuel gasses supplied at low pressure |
|
A combination cutting torch attachment can be used for |
Cutting only |
|
Cutting tips can be used interchangeably with torches from different manufacturers |
False |
|
|
blast furnace |
|
|
open hearth furnace |
|
|
basic oxygen furnace |
|
|
electric furnace |
|
|
rimmed/semi-killed/killed |
|
|
Grey cast iron/ white cast iron/ malleable cast iron/ nodular cast iron |